Irrigation &amp; Drainage Pipe

ABSTRACT

An irrigating &amp; draining apparatus comprises an outer pipe with a plurality of outer-wall irrigating &amp; draining holes. A main waterway is residing inside said outer pipe, wherein a wall of said main waterway comprises a plurality of inner-wall irrigating &amp; draining holes locating in a position higher than said outer-wall irrigation &amp; drainage holes. In comparison with existing technology, this irrigating &amp; draining apparatus will not drive vast number of sand and earth grains into irrigation &amp; drainage holes, which avoids clog.

BACKGROUND OF THE PRESENT INVENTION

1. Field of Invention

This invention is about irrigation & drainage pipe used in dripirrigation system, which especially involves an irrigation & drainagepipe apparatus which has non-uniformly arrayed irrigation & drainageholes.

2. Description of Related Arts

Traditional irrigation & drainage pipe conducts drainage throughdrainage hole scattered on pipe wall, or through pore on filter cloth,letting water flow in water drainage pipe and then drainage through themain water drainage pipe. This method is easy to block the penetratingdrain hole, and the main water drainage pipe gives a very poor drainageeffect. Furthermore, when water pass through the penetrating drainagehole or filter cloth, most times, it will leave some sand or earthcomponents. Day after day, it will block the penetrating drainage holeor the filter pore, which will thus fail to drain. If to extend thediameter of the penetrating drainage hole on the pipe wall, it willresult in a reduced pressure-resistance of water drainage pipe, and thuslead to a breakdown of the pipe body. Besides, when the large particlesof sand or earth grain pass through the expanded penetrating drainageholes and enter into the pipe, they will accumulate on the pipe bottom,which reduce the drainage area inside the pipe, and even block the pipe.When the irrigation & drainage pipe in used on slope, the dischargeoutlet on the drainage pipe is located near air plants, which will blockthe outlet when they grow up. This phenomenon is also mainly caused by avast number of sand or earth near the outlet of the drainage pipe, whichis carried by water and is accumulate at the bottom of the pipe. If theaccumulated sand is near the outlet of the pipe, it becomes hotbed forplants. When these plants grow up, they will block the outlet of thepipe. On the other possibility, the currently used drainage pipe hasevenly distributed drainage holes on the diameter of the pipe wall, soplant seeds on places with little sand or earth can stretch theirradicle into the drainage hole opened at the pipe bottom, and root nearthe bottom of the drainage hole. When they grow up with flourishedbranches and leaves, they will block the outlet of the pipe.

SUMMARY OF THE PRESENT INVENTION

The purpose of this invention is to provide a type irrigation anddrainage pipe, with arranging irrigation & drainage holes on differentlevel attitude on both inner and outer pipe walls, which form a pressuredifference between fluids to make drip irrigation. It prevents sand orearth from blocking the outlet of the irrigation & drainage pipe, whichovercomes the insufficiency of current irrigation & drainage pipeapparatus.

To achieve the above purpose, this invention adopts the followingtechnological scheme:

This type of irrigation & drainage pipe shall consist of outer pipe andnumerous outer wall irrigation & drainage holes opened on outer pipewall; inside the outer pipe, there is a main waterway, which housesnumerous inner wall irrigation & drainage holes on places above outerwall irrigation & drainage holes.

Said main waterway is a gutter, which fixedly connects to the inner wallof the outer pipe through the bottom and the top ears where equippedwith inner wall irritation & drainage holes.

Said outer pipe cross section is in round shape, or in similarity to thecorresponding outer pipe cross section of the cross section of thegutter which forms the main waterway.

Said gutter cross section is in shape of horse's hoof or in U or Vshape, and the said gutter should be at a height of about ½ pipe body.

Said main waterway is an inner pipe, which houses irritation & drainageholes on either side of the inner wall; the said inner wall irritation &drainage holes are located at height about ½ of the inner wall, and saidpipe surface consists of inner pipe surface and outer pipe surface withconcaves and convexes.

Said outer pipe consists of numerous inconsecutive sections, and each ofsaid sections comprises two gradually diminished ends to be connect toinner pipe.

Said outer pipe top houses numerous tiny micro-seep pores.

Said inner wall irrigation & drainage hole is in round, oval or squareshape.

There also may set one or more secondary waterways between said innerand outer pipe.

The inner wall of said inner pipe is formed with numerous division barsbetween inner and outer pipe.

According to the above technological scheme, this invention boasts thefollowing benefits:

1. Since the irrigation and drainage holes of the outer pipe aredesigned near the bottom, when the earth around the pipe is soaked, thewater level outside the pipe is higher than the inner irrigation &drainage holes, which are near the central level position inside thepipe. The water level difference produces a pressure difference. Thepressure difference, together with penetrating power, will push thewater outside the pipe into the outer irrigation & drainage holes at thebottom of the pipe, and will further push water through the innerirrigation & drainage holes into the main waterway, and then through themain waterway to drain out of the pipe. Therefore, the pipe is veryunlikely to be clogged.

2. Since the drainage is only based on self-filtering effect of sand orearth, the pressure difference and penetrating power penetrate the waterinto the irrigation & drainage holes at the pipe bottom. During thedraining operation, water will not produce a flushing pressure.Therefore, it will not carry vast quantity of sand or earth grains intothe irrigation and drainage holes or pipes to cause clog.

3. Besides, this type of irrigation & drainage pipe is washable usingspecial high-pressure water cleaning tools, regular maintenance andcleaning will prolong the functions of drainage or irrigation as well asthe working life.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the cutaway view of the first example on operation of thisinvention.

FIG. 2 is the A-A cutaway view of FIG. 1.

FIG. 3 is the cutaway view of the second example on operation of thisinvention.

FIG. 4 is the A-A cutaway view of FIG. 3.

FIG. 5 is the cutaway view of the third example on operation of thisinvention.

FIG. 6 is the A-A cutaway view of FIG. 5.

FIG. 7 is the B-B cutaway view of FIG. 5.

FIG. 8 is the cutaway view of the fourth example on operation of thisinvention.

FIG. 9 is the A-A cutaway view of FIG. 8.

FIG. 10 is the B-B cutaway view of FIG. 8.

FIG. 11 is the cutaway view of the fifth example on operation of thisinvention.

FIG. 12 is the A-A cutaway view of FIG. 11.

FIG. 13 is the cutaway view of the sixth example on operation of thisinvention.

FIG. 14 is the cutaway view of the seventh example on operation of thisinvention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

As FIG. 1 and FIG. 2 illustrate, the first example on operation of thisirrigation & drainage pipe consists of round outer pipe 1 and numerousouter wall irrigation & drainage holes opened at the bottom of the outerpipe 2. A main waterway is resided at pipeline of the outer pipe. Themain waterway is gutter 4. On the wall of the gutter higher than thebottom irrigation & drainage holes, there are numerous inner wallirrigation & drainage holes 3. The gutter is fixedly connected to theinner wall of outer pipe through ears 5 located both the bottom and thetop of the gutter. Ear 5 is set up on inner wall irrigation & drainageholes 3. Said outer pipe cross section is round, and said gutter has aheight of about ½ of the pipe. The cross section of the gutter is in theshape of horse hoof.

In comparison with existing technology, this invention requires to firstmix water with fertilizer to make irrigation fluid. Then, based on therequired quantity for crops and daily irrigation orders, the irrigationfluid is lead in the irrigation & drainage pipe placed in the filed.When the irrigation fluid enters into the horse's-hoof-shaped mainwaterway, the level attitude of the irrigation fluid will also rise upinto the pipe, near central level position of inner irrigation &drainage holes. When the inner water level is higher than the outer one,it produces a pressure difference from two different levels, which willfurther push the irrigation fluid at inner pipe into the innerirrigation & drainage holes near central level position. The irrigationfluid will then take advantage of the penetrating pressure, to drip tothe earth in the outer irrigation & drainage holes opened near the pipebottom through the horse-hoof-shaped main waterway and the innerirrigation & drainage holes, letting the earth directly absorb water andnutrition, avoiding evaporation and efflorescence, which realizes watersaving and stated and quantified irrigation targets. This type ofirrigation pipe also serves another purpose. When heavy rainfall couldflood the fields, the irrigation & drainage pipe will become a drainagesystem to drain out seeper.

Since the irrigation & drainage pipe is imbedded in earth, moisture inthe earth will penetrate in the horse-hoof-shaped main waterway, throughthe act of pressure difference, from a higher-level position outside thepipe through the outer irrigation & drainage holes opened on pipebottom. During the penetration, moisture must pass through the soil andsand-earth, which is in similarity to the self-filter effect ofsand-earth. The larger particles of soil or sand-earth will beself-filtered outside the bottom of the outer irrigation & drainageholes. The foresaid penetrating effect will prevent the soil andsand-earth around the pipe not be directly carried by water into theouter irrigation & drainage holes to cause clog. During experiments, itis discovered that when water penetrates in the irrigation & drainageholes, it will display in a distinct two-section type. The section withmore soil components will stay at the lower reach of the hole-way of theirrigation & drainage holes, while the section with less soil componentswill foremost enter in the main waterway due to the effect of thevolume. This indicates that all the water that passes through innerirrigation & drainage holes and then enter into the horse-hoof-shapedmain waterway, will contain only very tiny soil components withoutbig-sized soil or sand-earth to clog the pipe. It facilitates thedrainage. When soil and sand-earth outside the pipe is self filtered,there is only very tiny soil components left mixing in water into themain waterway, which is designed as horse-hoof-shaped, which is a knownshape for the biggest water-carrying area, the best drainage volume, andone of very strong structure shapes. Therefore, when the water with tinysoil components is led to the horse-hoof shaped main waterway, it iseasy to run through of the pipe under the powerful flow, which means theirrigation & drainage pipe also has self-cleaning functions.

Besides, this type of irrigation & drainage pipe is cleanable andmaintainable with special high-pressure-water cleaning tools at aregular basis, so as to enhance the pipe efficiency and to extend itsworking life.

FIGS. 3-4 are the second example on operation of this invention. Thedifference between this and the first example on operation is that saidgutter 4 a cross section is similar with the corresponding outer pipe 1a cross section, which is also in horse-hoof-shape.

FIGS. 5-7 are the third example on operation of this invention. Saidmain waterway is an inner pipe 4 b. The inner wall irrigation & drainageholes 3 b are set on either side of the inner wall of inner pipe. Thesaid inner wall irrigation & drainage holes are set on the place at aheight of about ½ of the inner pipe. The said pipe surface consists ofinner pipe surface and outer pipe surface with concaves and convexes,with outer pipe irrigation & drainage holes 2 b set on the bottom.

FIGS. 8-10 are the fourth example on operation of this invention; saidouter pipe 1 c consists of numerous inconsecutive sections, and each ofthe section comprises two gradually diminished ends to be connected toinner pipe 4 c. Same as the above examples, there are outer wallirrigation & drainage holes 2 c set on the outer pipe, and the innerpipe houses inner wall irrigation & drainage holes 3 c.

FIGS. 11-12 are the fifth example on operation of this invention; thedifference between this and the first example on operation is that saidinner wall irrigation & drainage holes 3 d are in square shape.

FIG. 13 is the sixth example on operation of this invention; thedifference between this and the first example on operation is that thesaid outer pipe 1 e and the top opposite to outer wall irrigation &drainage holes are equipped with tiny micro-seep pores.

FIG. 14 is the seventh example on operation of this invention. There arestill two secondary waterways between the inner and outer pipe. Theinner wall of the said inner pipe is formed with numerous division bars8 between inner and outer pipe. As the inner part is composed of twolayers of vacuum structure, it is divided as one part for main waterwaypart and the other part for irrigation & drainage holes. When materialsrequiring cooling circulate are flowing inside one of the vacuumstructures, they may conduct heat exchange with materials flow in theother layer in the irrigation & drainage holes at the same time, such aswater, engine oil, gas, etc.

According to the above examples on operation of this invention, thisinvention is applicable not only in irrigation field, but also in breastwall and slope drainage on lawn; or it may used for drainage on airporttraffic zone, highway and the road surface of cloverleaf junction; itmay also used for grass field drainage, such as football court andtennis court; besides it may be applied to internal leaking monitoringapparatus for architectures; it may be used as horizontal forcing pipefor grouting; it may also be placed at garbage piling & filling area,and sea-filling piling & filling area; and it may be used as main bodydrainage for stone dam; it may be set at the bottom of the concrete dam,as the high-efficiency water-saving sub-irrigation system, or asbox-type irrigation system.

1. An irrigating & draining apparatus comprising an outer pipe with aplurality of outer-wall irrigating & draining holes, characterized by: amain waterway residing inside said outer pipe, wherein a wall of saidmain waterway comprises a plurality of inner-wall irrigating & drainingholes locating in a position higher than said outer-wall irrigation &drainage holes.
 2. The irrigation & drainage apparatus according toclaim 1, wherein said main waterway is a gutter connected to aninner-wall of said outer pipe by passing through a bottom ear-plate anda top ear-plate of said gutter, and said inner-wall irrigating &draining holes are located on said bottom ear-plate and said topear-plate.
 3. The irrigation & drainage apparatus according to claim 2,wherein a cross-section of said gutter is horse-hoof-shaped, U-shaped orV-shaped.
 4. The irrigation & drainage apparatus according to claim 1,wherein a cross-section of said outer pipe is circular, or in similarshape to a cross-section of an outer pipe corresponding to saidcross-section of said gutter, and a height of said gutter is half of aheight of said outer pipe.
 5. The irrigation & drainage apparatusaccording to claim 1, wherein said main waterway is an inner pipecomprising a plurality of inner-wall irritation & drainage holes on bothsides of an inner wall of said inner pipe.
 6. The irrigation & drainageapparatus according to claim 5, wherein said inner-wall irrigation &drainage holes are located at a height half of said inner wall of saidinner pipe, and said inner pipe comprises inner pipe surface and outerpipe surface with a plurality of interseptal concaves and convexes. 7.The irrigation & drainage apparatus according to claim 1, wherein saidouter pipe comprises a plurality of inconsecutive sections, and each ofsaid sections comprises two gradually diminished ends in dimension to beconnected to said inner pipe.
 8. The irrigation & drainage apparatusaccording to claim 1, wherein a top part of said outer pipe comprises aplurality of pores.
 9. The irrigation & drainage apparatus according toclaim 1, wherein said inner-wall irrigation & drainage hole is incircular, oval or square shape.
 10. The irrigation & drainage apparatusaccording to claim 2, wherein said inner-wall irrigation & drainage holeis in circular, oval or square shape.
 11. The irrigation & drainageapparatus according to claim 5, wherein said inner-wall irrigation &drainage hole is in circular, oval or square shape.
 12. The irrigation &drainage apparatus according to claim 1, wherein at least one secondarywaterway between said inner pipe and said outer pipe.
 13. The irrigation& drainage apparatus according to claim 2, wherein said secondarywaterway between said inner pipe and said outer pipe.
 14. The irrigation& drainage apparatus according to claim 5, wherein said secondarywaterway between said inner pipe and said outer pipe.
 15. The irrigation& drainage apparatus according to claim 12, wherein said inner wall ofsaid secondary waterway comprises a plurality of division bars betweensaid inner pipe and said outer pipe.
 16. The irrigation & drainageapparatus according to claim 13, wherein said inner wall of saidsecondary waterway comprises a plurality of division bars between saidinner pipe and said outer pipe.
 17. The irrigation & drainage apparatusaccording to claim 14, wherein said inner wall of said secondarywaterway comprises a plurality of division bars between said inner pipeand said outer pipe.